create_graphql_api · API Creator MCP: Risk & Policy

WHAT IT DOES

What create_graphql_api does on API Creator MCP

AI agents use create_graphql_api to create or update resources in API Creator MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your API Creator MCP environment.

WHY IT NEEDS A POLICY

Why create_graphql_api needs a policy

This tool creates a new GraphQL API with server infrastructure, subscriptions, and data source integrations. It is a Write operation as it generates and likely persists new API configurations and code artifacts.

From the tool's definition 'Generate a GraphQL API with Apollo Server or Yoga, including subscriptions and data source integration'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_graphql_api Rate-limited

create_graphql_api stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_graphql_api": {
      "limits": [
        {
          "counter": "create_graphql_api_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches API Creator MCP, so you can run agents against it safely.

FAQ

Questions about create_graphql_api

What does the create_graphql_api tool do? +

Generate a GraphQL API with Apollo Server or Yoga, including subscriptions and data source integration. It is categorised as a Write tool in the API Creator MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_graphql_api? +

Register the API Creator MCP server in PolicyLayer and add a rule for create_graphql_api: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches API Creator MCP. Nothing to install.

What risk level is create_graphql_api? +

create_graphql_api is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_graphql_api? +

Yes. Add a rate_limit block to the create_graphql_api rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_graphql_api completely? +

Set action: deny in the PolicyLayer policy for create_graphql_api. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_graphql_api? +

create_graphql_api is provided by the API Creator MCP server (tolkyo/api-creator-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.